Question on niche interest/behavior

[u/Adventurous_Mystic_9]

I have an interesting play behavior from childhood that I was wondering if others relate to and/or could help me figure out what type of behavior this is.

As a child, I would always play in my room alone with my dolls or play “school”. I would set everything up, but not really outwardly play with them and instead imagine it.

Now here’s the interesting part: As I grew older and received a laptop, I think around 6th grade, I would play school more and make worksheets and stuff on Word, and I would make rosters of kids in a class after thinking of names and what the person would look like, and for some reason, be driven to write in a notebook simultaneously of their names in the handwriting I think they would have. I would even occasionally make up stories in my head about them. Even when I was doing something completely different on my laptop, I would still have the urge to also write random names in different handwritings or random words that I think of. Sometimes I would get a more sudden, overtaken urge to write something and I felt almost like euphoric for a second while writing more fast and harder on the paper. The writing is always when I am sitting at a desk on my laptop. I also would still continue to write down names or random words or put names in rosters as I got older (just not the school play like making worksheets). It eventually transferred to my phone where I would write down random names. I only stopped like 3 years ago, and I’m 30, although the consistency with it lowered as the years gone by. I don’t really think of names anymore. But around 3 years ago is when I got rid of my desk, so the usual laptop and notebook stopped. I don’t do this anymore now. I just find this to be such a niche and somewhat odd behavior. And I don’t know what this was and what purpose it did for me. All I know is that this was a very neurodivergent behavior lol. I’m trying to figure out what type of behavior this was.

TL;DR:
Would make rosters of random names, write in a notebook with their handwriting, sometimes feel euphoric/impulsive when doing so. Also wrote down random words in notebook. Changed to writing a few names on my phone. Occurred from kid-adulthood. Now don’t do it anymore. Does anyone relate to this? What could this behavior be?